PROBLEM TO BE SOLVED: To achieve, even if the arrangement position of an air cleaner is lowered, arrangement of a throttle body and an intake pipe and arrangement of a fuel injection valve between the throttle body and the cylinder head by arranging the fuel injection valve closer to an intake port in an internal combustion engine for saddle-riding type vehicle in which the air clear arranged between the cylinder head of an engine body with a cylinder axis leaned forward and a main frame is connected to the cylinder head via a connecting tube, the throttle body and the intake pipe.SOLUTION: An intake pipe to which a fuel injection valve 63 is attached is extended while being bent from an intake port 36 toward the front oblique upper side in a vehicle side view. Intake valve side and exhaust valve side maintenance openings 46, 47 are provided in a cylinder head 25. Intake valve side and exhaust valve side maintenance covers 48, 49 are mutually-independently attached to the cylinder head in an openable/closable manner.SELECTED DRAWING: Figure 2
【課題】シリンダ軸線を前傾させた機関本体のシリンダヘッドおよびメインフレーム間に配置されるエアクリーナが、コネクティングチューブ、スロットルボディおよび吸気管を介してシリンダヘッドに接続される鞍乗り型車両用内燃機関において、燃料噴射弁を吸気ポートにより近づけて配置し、エアクリーナの配置位置が下がってもスロットルボディおよび吸気管の配置、ならびにスロットルボディおよびシリンダヘッド間での燃料噴射弁の配置を両立させる。【解決手段】燃料噴射弁63が取付けられる吸気管が車両側面視で吸気ポート36から前方斜め上方に湾曲しつつ延出され、シリンダヘッド25に、吸気弁側および排気弁側メンテナンス開口部46,47が設けられるとともに、吸気弁側および排気弁側メンテナンスカバー48,49が相互に独立しつつ開閉可能として取付けられる。【選択図】 図2
INTERNAL COMBUSTION ENGINE FOR SADDLE-RIDING TYPE VEHICLE
鞍乗り型車両用内燃機関
2016-05-09
Patent
Electronic Resource
Japanese
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